Are you running a BackTrack VM guest within a Windows 7 host? What is "VB," VirtualBox? What network mode are you using? What is your host IP address?
The RFC 1918 private (non-routable) IPv4 address ranges are:
So it doesn't matter what range is used in a particular video. If you see IPs in the above ranges, they are in a private LAN. Given the IP address you are using, I'm somewhat suspicious of your environment. Why do you suspect your NIC?
10.0.0.0 - 10.255.255.255 (10/8 prefix)
172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
192.168.0.0 - 192.168.255.255 (192.168/16 prefix)